Staybolt structure



STAYBOLT STR 'c TTTT E.

UNITED STATES i PATENT. orifice.

ROBERT s. MENNrn,

QF CHICAGO, ILLINOIS, ASSIGNOB TO FLANNERY BOLT CCM- PANY, OE'EITISBURGH, PENNSYLVANIA.

s'rnvisorfr STRUCTURE.

To all whom t may concern:

Be it known that I, Ronn'r S. MENNIE, a citizen of Canada, and aresident of Chicago, in the county of Cook and State oi' Illinois, haveinvented certain new and useful Improvements in Staybolt Structures; andI do hereby'declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to Which it appertains to make and use the same.

This invention relates to improvements in staybolt structures forboilers, and particularly to the features which constitute the mountingand closure for the head of a staybolt of the flexible type,-the objector my invention being to provide a bearing member for the head of thebolt, which may be made to'bear freely against the outer face of aboiler sheet and be inclosed, With the head of the bolt, by a cap orhousing rigidly secured to the boiler sheet, thus obviating necessityfor securing the bearing member for the bolt to the boiler sheet.

With this and other objects in View, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims.

The accompanying drawing shows an embodiment of my invention.

1 represents an outer boiler sheet Which, Y in the present instance7 isrepresented as the inclined roof sheet of a heilensaid sheet having anopening 2 for the accommodation of a staybolt 3. It will be understoodthat the inner end of the staybolt may be secured in any suitable mannerto the horizontal inner sheet, not shown.

The head 3a of the staybolt may be of such form as to present a curvedor rounded face and a bearing member 4 is employed to provide a seat forthe curved or rounded bolt-head. This bearing member is in the form of asleeve having a curved seat 5 or the round head of the staybolt and saidbearing member rests freely against the outer face of the boiler sheetaround the bolt opening 2 in the latter. v

To adapt the sleeve or bearing member to the inclination of the roof orcrown sheet and still permitthe staybolt to be disposed at right anglesto the inner boiler sheet With which it is connected, the lower end ofsaid sleeve or bearing member is beveled as at 6,

Specification of Letters'lPatent. Patented Jan, 25, 1921.'

Application led Air-gust 16,

19197.4 Serial No. 317,891.

and this beveled lower end is made to conform to 4the contour of thesheet and bear freely thereon.

The bearing member 4c and the bolt head 3a are inclosed by a housing orclosure 7 which surrounds said bearing member and retains the same inproper position on the Y boiler sheet and which has such form or contouras to provide a clearance 8 for the 'bolt head. The housing or closure 7is beveled as at 9 to conform to the inclination of the boiler sheet, sothat it may assume a positionA substantially in axial alinementy withthe staybolt.

W'hen the parts shall have been assembled, the housing or closure 7 willbe fixedly united to the boiler sheet by means of a Weld l0. This Weldsurrounds the housing or closure at its edge and eifects an integralunion of the same with the boiler sheet.

I have shown a tell-tale hole 11 Which terminates at its outer endWithin the headed end ot' the bolt, and this tell-tale hole may extendto the inner end of the bolt to facilitate testing said bolt.

Having `fully described my invention vvhat I claim as nevv and desireVto secure by Iletters-Patent, is

l. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a bearing member disposed freely against the boilersheet around said opening, a staybolt having a head mounted on saidbearing member, and a closure inclosing the bearing member and bolt headand secured to the boiler sheet.

2. In a staybolt structure, the combination with a boiler sheet having abolt opening, of a bearing member freely engaging the boiler sheetaround said opening, a Vstay bolt having a head mounted in said bearingmember, a housing closely encircling and engaging said bearing memberand Welded to the boiler sheet, said housing having a part projectingbeyond said bearing member and inclosing the headof the staybolt.

3. In a staybolt structure, the combination with an inclined boilersheet having a bolt opening, of a bearing member having a beveledportion freely engaging said sheet around said opening and having a seatfor the head of a staybolt, a staybolt having a head mounted on saidseat, and a housing surrounding said bearing member and constituting aclosure for the same and also for rthe bolt head, and a Weld unitingsaid housing to the boiler sheet. o

4. In a staybolt structure,.the combinetion with a boiler sheet havingvat bolt opening7 a bearing member Seated freely on theV boilersheetaround Said opening, a staybolt having a heed mounted on saidbearing member, and a housing surrounding and engaging said bearingmember and inolosing the bolt hea-d and having euch dimensions es toprovide a. eleunnce for the bolt head, seid housing being welded to theboiler sheet. A

5. In `a st eybolt structure, the combina-- tion With an inclined boilersheet having e bolt opening, of a bearing member having` Y an inclinedinner end seated freelyvon said sheet around the bolt opening, a's'taybolt having a, head mounted on said bearing member,l and V2Lhousing surrounding Vthe 2o bearing member and bolt head and having aninclined inner end Welded to the boiler sheet. o Y

In testimony whereof, I have signed this Speciioation inv the seribingWitnesses.

fitnesses Y GLEN E. SMITH, LoRn'rTA DEMPSEY.

presence of two sub- 25 ROBERT e. MENNiE.

